GRANT, Jennifer; WIGNERON, Jean-Pierre; WILLIAMS, Mathew; SCHOLZE, Marko; KERR, Yann H.

doi:10.1109/IGARSS.2014.6946413

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GRANT, Jennifer
Skane University Hospital [Lund]

WIGNERON, Jean-Pierre
Interactions Sol Plante Atmosphère [UMR ISPA]

WILLIAMS, Mathew
University of Edinburgh [Edin.]

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Geoscience and Remote Sensing Symposium (IGARSS), 2014 IEEE International, 2014-07-13, Québec. 2014

IEEE

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In this study, vegetation optical depth from ESA's Soil Moisture and Ocean Salinity (SMOS) satellite mission is combined with other existing remote sensing, meteorological and literature data in order to obtain values of gravimetric vegetation water content (Mg). The methodology combines an effective medium model valid at passive microwave frequencies with a vegetation dielectric constant model. The algorithm is calibrated for 11 global vegetation classes. The resulting product consists of temporally dynamic ~ 25 km global grids of Mg. The first maps clearly show seasonal differences in vegetation water, which vary for the different continental regions due to variations in e.g. latitude, climate and landcover type. This new vegetation water product is unique and offers important complementary information to existing vegetation indices.< Réduire

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SMOS

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vegetation optical depth

vegetation water content

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Working towards a global-scale vegetation water product from SMOS optical depth

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